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Mean Sun (Noun)

Meaning

A theoretical sun that moves along the celestial equator at a constant speed and completes its annual course in the same amount of time the real sun takes at variable speeds.

Classification

Nouns denoting cognitive processes and contents.

Examples

  • The mean sun is a theoretical concept used in astronomy to simplify calculations and provide a consistent reference point for timekeeping.
  • The position of the mean sun is used to define mean solar time, which is the basis for modern civil time.
  • In contrast to the real sun, the mean sun moves at a constant speed along the celestial equator, completing its annual course in 365.24219 days.
  • The mean sun is often used as a reference point for calculating the positions of celestial bodies and predicting astronomical events.
  • The difference between the mean sun and the real sun is known as the equation of time, which can be as much as 16 minutes over the course of a year.

Hypernyms

  • Theoretical Account
  • Framework
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